What is Scanning?
Scanning refers to the process of converting tangible documents, for example receipts, forms, letters, contracts & other documents into digital copy or electronic scripts which can be effortlessly attached as a part of archive database in home or office computers or may be added to a central database.
Several scanners are available in the market. However which one is ideal for you depends upon how you intend to use it. Most widely recognized one are Drum scanner, Microfilm scanner, Flatbed scanner, sheet-fed scanner, and so on… Now let us discuss some common types of scanner in details.
Flatbed scanner is a kind of optical scanner having flat surface on which one can lay down the documents to be scanned. Flatbed scanners are particularly ideal for bound documents such as occasional newspaper article, photograph, book chapter, or for scanning bulky items such as DVD cover, and so on.. Flatbed scanners are frequently built with multifunctional printers (Mfps). Flatbed scanners are available at a price of 100 USD or less.
Photo scanner is kind of optical scanner especially designed for scanning photographs. Photo scanners are smaller in size than general purpose scanners but give high resolution. A photo scanner encompasses specific technology so that they can effectively deal with slide & negatives; also they have in-built software to clean up old photographs. A standard photo scanner is a sheet-fed scanner, can scan upon 3*5 inch or 4*6 inch photographs at 300 dpi or higher resolution. Market rate of a standard photo scanner begins from 130 USD.
Portable scanners are small enough to bring out and about. Indeed, some are sufficiently small to put in your pocket; pen scanners are just greater than fountain pens and scan the document text line by line. Some of the portable scanners are as wide as a page and roll effectively down the page. However they didn’t give high-resolution scans, therefore are not suitable for scanning photographs or other applications which requires a high-quality result. Since they’re not less expensive than flatbed scanners, they’re presumably appropriate for a student, a spy or a researcher. An portable scanner is available at a price of USD 150
Sheet-fed scanners are slighter smaller than flatbed scanners; as the name suggests, you put the document or photograph to be scanned into the scanner instead of placing it on the top. You might win over some desktop space with a sheet-fed scanner however you may have to sacrifice on some resolution in the process. If you are only scanning documents, but, it might be an advantageous trade, particularly if you’ve got a considerable of them since you can put them in bunches. With a flatbed scanner, you will need to scan page by page (unless it accompanies an automatic document feeder). Market price of Sheet-fed scanners begins around USD 300.
Drum scanners are widely used for producing color separations mainly for high-end printing (by professional color trade shop). Typically drum scanners use Photo Multiplier Tube (PMT) technology for more prominent color and range accuracy. Furthermore drum scanners offers features not accessible to desktop scanners, for example, instant conversion to CMYK, batch scanning, auto sharpening, larger dynamic range, and so on. Since the procedure of scanning to CMYK is automatic, drum scanner can create a larger number of scans per hour than a desktop unit.